Question

Catalytic convertors are used in automobiles to reduce emissions of harmful compounds. What are those harmful compounds?

• A. Methane
• B. Hydrogen sulphide
• C. Hydrocarbons
• D. Carbon monoxide

Answer 1

Answer: (C), (D)

The correct options are
C Hydrocarbons
D Carbon monoxide

Modern cars are fitted with a catalytic converter to control emissions of harmful compounds present in vehicle exhaust in order to decrease air pollution. These harmful compounds are: hydrocarbons and carbon monoxide. Carbon monoxide is a poisonous gas and hydrocarbons causes smog. Before leaving the exhaust system of the car, these are converted to less harmful compounds. Carbon monoxide($CO$) is converted to carbon dioxide($C{O}_2$). And hydrocarbons($HC$) are converted into carbon dioxide($C{O}_2$) and water($H_{2}O$).